时间问题:和肥应用时间对根系架构反应的不同影响
Richard van Duijnen1, Hannah Uther1, Werner Härdtle1
1Institute of Ecology Faculty of Sustainability Leuphana University Lüneburg Lüneburg Germany.
Plant-environment interactions (Hoboken, N.J.)
|June 7, 2023
概括
晚期 (N) 应用对大麦根的生长产生了更大的负面影响,而不是晚期 (P) 应用. 营养物质输送的时间显著影响根系架构和整体植物发育.
科学领域:
- 植物科学 植物科学
- 农业学是一种农业学.
- 根系生物学 根系生物学
背景情况:
- 植物对 (N) 和 (P) 的食反应得到了很好的研究.
- 肥料应用时间对根系架构 (RSA) 的影响不太清楚.
研究的目的:
- 调查N和P应用的时间如何影响Hordeum vulgare L. (大麦) 的RSA.
主要方法:
- 在营养不良的土壤中,大麦植物在树根箱中长了38天.
- 缺乏N或P的营养溶液在播种后2,3或4周后被应用.
- 随着时间的推移,监测了根生长,植物生物质和营养吸收.
主要成果:
- 与连续的N和P或晚期P应用相比,晚期N应用显著减少了总根生物质和根长度.
- 根质量分数保持一致,但相对根分配在较深的土壤层中随着N的晚期应用而增加.
- 射击P度稳定,而接受P的植物后来显示出更高的N度.
结论:
- 晚期的N应用一般比晚期的P应用对大麦的早期生长产生更大的不利影响.
- 未来的实地研究应该区分营养定时与营养可用性对RSA和植物性能的影响.
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